This book is concerned with the processing of signals that have been sam pled and digitized. The fundamental theory behind Digital Signal Process ing has been in existence for decades and has extensive applications to the fields of speech and data communications, biomedical engineering, acous tics, sonar, radar, seismology, oil exploration, instrumentation and audio signal processing to name but a few 87]. The term "Digital Signal Processing," in its broadest sense, could apply to any operation carried out on a finite set of measurements for whatever purpose. A book on signal processing...